We used to rebuild it in Scope::Analyze but this might lead to mismatch between scopes seen by parser during the first and the second parse of the function.

BUG=v8:1230

Review URL: http://codereview.chromium.org/6646017

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7110 ce2b1a6d-e550-0410-aec6-3dcde31c8c00